Thailand's unemployment rate was around 1 per cent at the end of June. In July, its consumer price index rose by 0.1 per cent year-on-year, down from a 0.4 per cent increase in June.

But Bloomberg pointed out that while beneficial to consumers, slowing inflation may signal a less than healthy economy.

"Disinflation is a sign that demand for goods and services is insufficient to match supply in an economy," Sumitomo Mitsui Banking Corp global market analyst Satoshi Okagawa was quoted by the business news website as saying.

"It encourages consumers to delay purchases until goods become cheaper, further lowering demand. In this deflationary spiral, wages will drop."

Japan is the third least miserable country with an index of 2.7 per cent.

China, the US and the UK rank 23rd, 21st and 17th respectively.

The most miserable economy is Venezuela, which tops the list once again with an index of 188.2 per cent. Inflation runs at 181 per cent in the South American country, which faces chronic shortage of food and medicine due to plunging oil revenues.